Licence: Public Domain Mark
Credit: Karl Friedrich Heinrich Marx. Lithograph. Wellcome Collection. Source: Wellcome Collection.
![no text alternative](https://iiif.wellcomecollection.org/image/L0025130/full/800%2C/0/default.jpg)
Licence: Public Domain Mark
Credit: Karl Friedrich Heinrich Marx. Lithograph. Wellcome Collection. Source: Wellcome Collection.